[Qt-interest] what's wrong with my QProcess in corba class?

[梁秋实]

i wrote my servant implementation Process_i  as follows:



#ifndef PROCESS_I_H
#define PROCESS_I_H

#include "process.hh"
#include <QtDebug>
#include <QProcess>
#include <QString>
#include <QStringList>
#include <omniEvents/CosEventComm.hh>
#include <omniEvents/CosEventChannelAdmin.hh>

class Process_i : public QObject, public POA_Process
{
    Q_OBJECT
public:
    inline Process_i()
    {
        _QProcess = new QProcess();
        connect(_QProcess, SIGNAL(started()), SLOT(onStarted()));
        connect(_QProcess, SIGNAL(finished(int)), SLOT(onFinished()));
        connect(_QProcess, SIGNAL(error(QProcess::ProcessError)), SLOT(onError()));
        connect(_QProcess, SIGNAL(readyReadStandardOutput()), SLOT(onReadyReadOutput()));
        connect(_QProcess, SIGNAL(readyReadStandardError()), SLOT(onReadyReadError()));
    }
    CORBA::Long exitCode();
    char* readAllStandardError();
    char* readAllStandardOutput();
    void setWorkingDirectory(const char* dir);
    void start(const char* program, const stringlist& arguments);
    CORBA::Short state();
    CORBA::Boolean waitForStarted();
    void kill();
    void terminate();
    inline bool isQObject() const { return true; }
    inline QObject* toQObject() { return this; }
    void setProxyPushConsumer(CosEventChannelAdmin::ProxyPushConsumer_var);
    void test();
private slots:
    void onStarted();
    void onFinished();
    void onError();
    void onReadyReadOutput();
    void onReadyReadError();
private:
    QProcess* _QProcess;
    CosEventChannelAdmin::ProxyPushConsumer_var proxy_consumer;
};

void Process_i::start(const char* program, const stringlist& arguments)
{
    QString _program(program);
    QStringList _arguments;
    for(unsigned int i=0;i<arguments.length();i++)
        _arguments.append(QString(arguments[i]));

    _QProcess->start(_program, _arguments);
}
/************************************************************************/


and the client implementation is:



        CORBA::ORB_var orb = CORBA::ORB_init(argc, argv);

        CORBA::Object_var obj=orb->resolve_initial_references("RootPOA");
        PortableServer::POA_var poa =PortableServer::POA::_narrow(obj);
        PortableServer::POAManager_var pman =poa->the_POAManager();
        pman->activate();



        obj = getObjectReference(orb);
        apProcess = Process::_narrow(obj);

    if(CORBA::is_nil(apProcess))        return false;    apProcess->setWorkingDirectory(workingFolder.toString().toLatin1().data());    apProcess->start(appUrl.path().toLatin1().data(), argumens);    apProcess->waitForStarted();
/************************************************************************/
i called apProcess->start to run "ls" on another computer, the client received started signal but could't receive  readyReadStandardOutput and finished signal, i found the "ls" became a zombie and couldn't exit.Besides,i got the following message:




QObject: Cannot create children for a parent that is in a different thread.
(Parent is QProcess(0x984fd20), parent's thread is QThread(0x982b440), current thread is QThread(0x985bd28)
QSocketNotifier: Can only be used with threads started with QThread

What's wrong????????
thanks in advance


 		 	   		  
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